initial commit

build/ksyms.py

@@ -0,0 +1,66 @@
+#!/usr/bin/env python3
+# Simple kernel symbol dumper
+# Usage: ksyms.py --input <kernel binary> --output <output file>
+
+import sys
+import subprocess
+import argparse
+
+excluded_symbols = ['text_start_addr', 'text_end_addr', 'rodata_start_addr', 'rodata_end_addr', 'data_start_addr', 'data_end_addr']
+
+def parse_nm_line(line: str) -> tuple[int, str]:
+    parts = line.split()
+    if len(parts) < 3:
+        return None
+
+    addr_str, type, name = parts[0], parts[1], parts[2]
+
+    # Only get symbols in text 
+    if type.lower() != 't':
+        return None
+    
+    if name in excluded_symbols:
+        return None
+
+    addr = int(addr_str, 16)
+    return addr, name
+
+def run_nm(binary: str) -> list[str]:
+
+    result = subprocess.run(["nm", "-n", binary], capture_output=True, text=True)
+    if result.returncode != 0:
+        raise RuntimeError(f"nm failed: {result.stderr}")
+    return result.stdout.splitlines()
+
+parser = argparse.ArgumentParser(description="Generate kernel symbols from a binary")
+parser.add_argument("--input", help="Input kernel binary")
+parser.add_argument("--output", help="Output C file")
+parser.add_argument("--empty", action="store_true", help="Generate empty ksyms")
+args = parser.parse_args()
+
+if args.empty:
+    with open(args.output, 'w') as f:
+        f.write("// Auto-generated by build/ksyms.py - do not edit\n\n")
+        f.write("pub const KSym = struct {\n    addr: u64,\n    name: []const u8,\n};\n\n")
+        f.write("pub const ksyms: []const KSym = &.{};\n")
+    sys.exit(0)
+
+lines = run_nm(args.input)
+
+symbols = []
+for line in lines:
+    parsed = parse_nm_line(line)
+    if parsed:
+        symbols.append(parsed)
+    
+
+# Sort by address
+symbols.sort(key=lambda x: x[0])
+
+with open(args.output, 'w') as f:
+    f.write("// Auto-generated by build/ksyms.py - do not edit\n\n")
+    f.write("pub const KSym = struct {\n    addr: u64,\n    name: []const u8,\n};\n\n")
+    f.write("pub const ksyms: []const KSym = &.{\n")
+    for addr, name in symbols:
+        f.write(f"    .{{ .addr = 0x{addr:016x}, .name = \"{name}\" }},\n")
+    f.write("};\n")